Here is a little back story on the bike. I was given this bike a while back and it didn't run (shocker). I did all the normal checks when evaluating the reason why it wasn't starting ie spark,fuel,compression,air. The bike was getting spark had plenty of compression. I decided to go ahead and rebuild the carb. During the tear down obviously the jets were a little clogged and the accelerator pump diaphragm was trashed. I replaced everything with brand new parts and cleaned out all of the jets. I then checked the float height and adjusted accordingly. I put the bike back together with the fresh carb and new petcock. I followed the starting procedure I found on this forum with no success. I decided to try starting fluid, still with no success. I once again verified the bike was getting fuel and spark, which it was. I checked the timing and it was correct (exhaust cam was rotated clockwise 1 tooth which I found is a yz timing adjustment). The bike has plenty of compression but still won't start. I'm starting to run out of ideas at this point . Any suggestions would be greatly appreciated! The bike is a 99 WR400F with stock jetting and stock exhaust.